MAR-MTRCV-11-15 - MTR CVR F20/ F15C This particular cover is for all F20/F15C Yamaha outboards. It is constructed of durable SurLast solution-dyed polyester fabric. SurLast fabric offers the ultimate protection against the harsh marine environment. This non-abrasive, water-resistant cover is also resistant to UV rays, mold, and mildew for added protection. The cover features an adjustable snap-buckle strap for a secure and snug fit.